By Akash Sriram (Reuters) -Amazon.com Inc will acquire iRobot Corp, maker of the robotic vacuum cleaner Roomba, in an all-cash deal for about $1.7 billion in the latest push by the world’s largest online retailer to expand its stable of smart home devices. Amazon will pay $61 per share, valuing iRobot at a premium of 22% to the stock’s last closing price of $49.99. iRobot’s stock rose 19% in Friday trading to $59.66. At its peak during COVID-19 pandemic lockdowns, iRobot shares were more than twice that price as hygiene-conscious consumers invested in premium vacuum cleaners. The acquisition f…